Tire-casing



F G. RENOS.

TIRE CASING.

APPLmATloN man AuG.24. 1920A Patented Dec. bf, 1921.

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F. G. RENOS.

TIRE CASING.

APPLICATION man Aua.24, 1920.

1,398,975, Patented im. 1921; 2 sHEETssHEET 2.

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1.3989975, Specification of Letters latezzt.

application mcd ,august 2li, 195W.

To all whom t may concern."

e it linow'n that l, FRANK G. Rnivos, a citizen of the United States, residing at Akron, in the county of Summit and State of hio, have invented certain new and use ful lniproveinents in a Tire-Casing, of which the following is a speciiication.

This invention pertains to a new and iinproved casing for pneumatic tires, all as shown in the accompanying drawings and hereinafter fully described.

In the drawings herewith, Figure l is, a perspective view of a section of a complete tire casing constructed according to my invention and in one of the preferred forms, and Fig. 2 is a longitudinal sectional elevation through the centenof Fig. l. 3 is a plan view on the sectional line 3-3- in Fi .2.

igs. e, 5 and 6 have to do more especially with primary steps in the manufacture of the casing and Fig. d illustrates a diagrammatic cross section of the sii-called carcass and a cross section of a core over which it is formed. Fig. 5 shows a diagrammatic cross section of the said carcassafter the core -is Withdrawn and having,l an annular depression or channel formed inside in the tread by said core,` and Fig. o corresponds identically with Fig. 5 in outline, except that it shows one of-a series of diametrical holes Fig. 7 is a full line cross section of the outer or tread portion of the carcass and with a tubular rivet `or eyelet occupying one of the holes shown in Fig. 6, and Fig. 8 is a cross section corresponding to Fig. 7 with the -addition of a rivet spindle through said tubular rivet and an outside Washer and an annulus of fabric Wound' or built about said spindle between said Washer and tubular rivet. Fig. 9 is a plan View of a portion of a modified form of the immediate tread por-l tion of the tire' casing.

The steps that necessarily obtain in the manufacture of the casing run through Figs. 4 to 8 and into Fig. l as a nished product. rl'hese ste s involve, rst the formation of the. so-ca led carcass c of the tire casing and which isbuilt up, with layers of fabric after the usual manner but with the novel feature of construction seen in the annular depression or channel 2 on the inner side of the tread or periphery ofthe casing. This channel or depression is rendered necessary to provide accommodation for additional casing as will presently be seen Aduced oy the special form of Patented Elec. rl, lh Serial No. 405,635.

parts entering into the construction of the and is prov core e shown in Fig. 4;, and havingl a rib 3 about its pe riphery of the requisite width and depth-to producethe said channelwhen the carcass is developed thereon after the shown. rJhe carcass having been thus fabricated with the channel therein, the next step is to bore or form holes 4 at regular and frequent intervals through the tread or periphery of the carcass of a size adaped to receive the tubular rivets 5., and which are provided with relatively wide flanges or upset portions clamping `firmly upon opposite sides Aand with the inner lianges retired Within the annular channel 2 at such depth that said flanges cannot Work possible injury to the pneumatic tube used Within the casing.

ow, assuming that all the said rivets are in position, l proceed next to build in other parts therewith to the end ultimately of providing a tire or tire casing which has the essential advantages of durability and of being practically puncture-proof and nonskidding. The additional or supplemental parts referred to comprise the all rubber outer tread portion d of the casing which overlies the carcass within and the special means which recur with each tubular rivet and also are built into said rubber tread d' through openings therein corresponding to the holes fi in the carcass. The said openings also come centrally Within bosses l0 formed in said tread and have fairly deep channels about them to prevent skidding. However, the invention contemplates firm structural resistance under weight/at these 'recurring` points in the tread, and to this end l e iploy the solid rivet spindle 7 which is upset' against the bottom of the tubular rivet and extends through 'the same and the tread d and has a comparatively wide washer 8 resting;r under. the beveled head thereof flat upon said boss l0, and covering the top thereof. The said spindle furtherhas a Wrapping of several layers of fabric lll built about the same between the metal Washer 8 and the outer flange of the'tubular rivet 5 on which the fabric rests in sustaining relations to said Washerv or disl. Finally. as a protection to the pneumatic tube, l lay a fabricor fibrous strip l5 within the inner channel 2 of the casing over the heads' of the rivets and the entire embodinient is then vulcanized and finished for use.

Tnanner (lll Q also are shown in the edges of the raised or tread portion of the casing in which the said bosses and their` surrounding channels are developed.

The tubular rivets 5 fixed as they are in the fibrous base of the easing plrovide an especially firm and durable anchorage for the spindle 7 and Washers 8 supplemental thereto and particularly when further strengthened by the heavy fibrous 'Wrapping 14 about the outer half of the spindles in the all rubber tread portion of the casing.

WhatI claim is: A tire casing having successive bosses 'developed in its periphery With depressions about the same and traction means b uilt in and upon said bosses comprising headed rivet spindles extending diametrically through said bosses and anchored on the inner side of the casing and washers onl Said spindles resting on said bosses.

Signed at Cleveland, in the county Cuyahoga, and State of Ohio, this 22nd day of July, 1920 FRANK Gr'.` REN-OS. 

